Dear List,
This module is to replace the existing one that is shipped with
<app-admin/eselect-postgresql-1.0.3. It is an entire rewrite.
Changes can be tracked at:
http://git.overlays.gentoo.org/gitweb/?p=proj/pgsql-patches.git;a=shortlog;h=refs/heads/eselect
Before you start reading the attached module, please bear in mind that I
am a novice at writing BASH scripts, and am not intimately familiar with
all the nuances of the language.
There is some duplication of work within the module when compared with
the current postgresql-{base,server}-*.ebuilds in the tree. The plan is
to move that work being handled in the ebuilds to the module.
Setting a service slot has been dropped from the module as it is no
longer necessary.
Features:
* Supports --brief output
* Prefix compatible
* Slot specific application links (e.g., psql90, createdb84)
* Automatically sets the highest slot available as the default unless a
valid slot is already set
* Properly orders LDPATH giving preference to the set slot and then
lists the other slots in descending order
Thank you.
Sincerely,
Mr. Aaron W. Swenson (TitanOfOld)
# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: $
inherit config multilib output package-manager path-manipulation
DESCRIPTION="Manage active PostgreSQL client applications and libraries"
MAINTAINER="pgsql-b...@gentoo.org"
SVN_DATE='$Date: $'
VERSION="1.0.4"
# Global Data
B_PATH="${EROOT%/}/usr"
E_PATH="${EROOT%/}/etc/eselect/postgresql"
ENV_FILE="${EROOT%/}/etc/env.d/50postgresql"
if [ -r ${E_PATH}/active -a -n ${E_PATH}/active ] ; then
ACTIVE_SLOT=$(<${E_PATH}/active)
else
ACTIVE_SLOT="(none)"
fi
LIB_LIST=$(list_libdirs)
if [[ ${LIB_LIST} =~ .*lib64.* && "$(ls -d ${B_PATH}/lib64/postgresql-*/lib)"
!= "" ]] ; then
LIBDIR="lib64"
elif [[ ${LIB_LIST} =~ .*lib32.* && "$(ls -d ${B_PATH}/lib32/postgresql-*/lib)"
!= "" ]] ; then
LIBDIR="lib32"
else
LIBDIR="lib"
fi
### Linker Function ###
# Takes three arguments:
# - Full source path (e.g. /usr/lib/postgresql-9.0/lib/lib*.{a,so})
# - Full target directory path (e.g. /usr/bin)
# - Suffix (Optional) (e.g 84 to make /usr/bin/psql84)
linker() {
local source_dir=$1
local target_dir=$2
local suffix=$3
local link_source
for link_source in $(eval ls ${source_dir} 2> /dev/null) ; do
local link_target="${target_dir%/}/$(basename
${link_source})${suffix}"
# For good measure, remove target before creating the symlink
[ -h ${link_target} ] && rm -f ${link_target}
[ -e ${link_target} ] && die -q "The target '${link_target}'
still exists and could not be removed!"
ln -s ${link_source} ${link_target} || die -q "Unable to create
link!"
echo ${link_target} >> ${E_PATH}/active.links${suffix}
done
}
### Unlinker Function ###
# Takes one argument:
# - Full path to active links file (e.g. /etc/eselect/postgresql/active.links)
unlinker() {
local active_link_file=$1
if [ -r ${active_link_file} ] ; then
local active_links=($(<${active_link_file}))
for (( i=0; $i < ${#active_links[@]}; i++ )) ; do
[ -h ${active_links[$i]} ] && rm -f ${active_links[$i]}
[ -e ${active_links[$i]} ] && die -q "The target
'${active_links[$i]}' still exists and could not be removed!"
done
rm -f ${active_link_file}
fi
}
### Get Slots Function ###
# Find all available slots in the preferred LIBDIR and return them.
get_slots() {
echo $(ls -dv ${B_PATH}/${LIBDIR}/postgresql-* 2> /dev/null | sed -re
's#^.+-##')
}
### List Action ###
describe_list() {
echo "List available PostgreSQL slots."
}
do_list() {
write_list_start "Available PostgreSQL Slots"
if $(is_output_mode brief) ; then
echo $(get_slots)
else
local slot
for slot in $(get_slots) ; do
local postgres_ebuilds=""
local src
for src in
${E_PATH}/slots/${slot}/{server,service,base,docs} ; do
[ -r ${src} ] && source ${src}
done
case "${slot}" in
"${ACTIVE_SLOT}" ) write_kv_list_entry
"$(highlight_marker ${slot})" "${postgres_ebuilds//postgresql-/}";;
* ) write_kv_list_entry
"${slot}" "${postgres_ebuilds//postgresql-/}";;
esac
done
[ -z "${postgres_ebuilds}" ] && write_warning_msg "No slots
available."
fi
}
### Show Action ###
describe_show() {
echo "Show which slot is currently active."
}
do_show() {
echo ${ACTIVE_SLOT}
}
### Show Service Action ###
# Here for backwards compatibility with ebuilds
describe_show-service() {
echo "Deprecated. For ebuild use; returns no useful information."
}
do_show-service() {
echo 1
}
### Set Action ###
describe_set() {
echo "Create symbolic links for PostgreSQL libraries and applications."
}
do_set() {
local SLOT=$1
if [ ! -d ${B_PATH}/${LIBDIR}/postgresql-${SLOT} ] ; then
die -q "Not a valid slot."
fi
echo "Setting ${SLOT} as the default installation..."
# Remove the active links to start a fresh list
echo -ne "\tRemoving old links..."
unlinker ${E_PATH}/active.links
echo "done."
echo -ne "\tGenerating new links..."
# Sources and targets for header files
local sources=(
${B_PATH}/include/postgresql-${SLOT}
${B_PATH}/include/postgresql-${SLOT}/libpq-fe.h
${B_PATH}/include/postgresql-${SLOT}/pg_config_manual.h
${B_PATH}/include/postgresql-${SLOT}/libpq
${B_PATH}/include/postgresql-${SLOT}/postgres_ext.h
)
local targets=(
${B_PATH}/include/postgresql
${B_PATH}/include/libpq-fe.h
${B_PATH}/include/pg_config_manual.h
${B_PATH}/include/libpq
${B_PATH}/include/postgres_ext.h
)
# The linker function cannot accomadate this special purpose.
local i
for (( i=0; $i < ${#sources[@]}; i++ )) ; do
# Remove target before creating the symlink
rm -f ${targets[$i]}
# Check if link_target still exists
[ -e ${targets[$i]} ] && die -q "The target '${targets[$i]}'
exists and could not be removed!"
ln -s ${sources[$i]} ${targets[$i]} || die -q "Unable to create
link!"
echo ${targets[$i]} >> ${E_PATH}/active.links
done
# Link modules to /usr/lib{,lib32,lib64}/
local x
for x in ${LIB_LIST} ; do
if [ -d ${B_PATH}/${x}/postgresql-${SLOT}/${x} ] ; then
# 'linker' function doesn't work for linking
directories.
# Default lib path
ln -s ${B_PATH}/${x}/postgresql-${SLOT}/${x}
${B_PATH}/${x}/postgresql
echo ${B_PATH}/${x}/postgresql >> ${E_PATH}/active.links
# Linker works for files
linker
"${B_PATH}/${x}/postgresql-${SLOT}/${x}/lib*.{a,dylib,so}" "${B_PATH}/${x}"
fi
done
# Link binaries to /usr/bin/
linker "${B_PATH}/${LIBDIR}/postgresql-${SLOT}/bin/*" "${B_PATH}/bin"
# Default share path
ln -s ${B_PATH}/share/postgresql-${SLOT} ${B_PATH}/share/postgresql
echo ${B_PATH}/share/postgresql >> ${E_PATH}/active.links
echo ${SLOT} > ${E_PATH}/active
echo "done."
echo -e "\033[1mSetting ${SLOT} as default was successful!\033[0m"
}
### Unset Action ###
describe_unset() {
echo "Remove symbolic links."
}
do_unset() {
local SLOT=$1
if [ "${SLOT}" = "${ACTIVE_SLOT}" ] ; then
echo -n "Unsetting ${SLOT} as the default installation..."
unlinker ${E_PATH}/active.links
rm -f ${E_PATH}/active
echo "done."
else
echo "Inactive slot selected. No work to do."
fi
}
### Reset Action ###
describe_reset() {
echo "Recreate symbolic links for currently active slot."
}
do_reset() {
[ "${ACTIVE_SLOT}" = "(none)" ] && die -q "No active slot to reset."
do_unset ${ACTIVE_SLOT}
do_set ${ACTIVE_SLOT}
}
### Update Action ###
describe_update() {
echo "Refreshes all symbolic links managed by this module"
}
do_update() {
# Check for files managed by postgresql.eselect before 1.0
[ -h /etc/eselect/postgresql/active ] && ACTIVE_SLOT="$(basename
$(canonicalise /etc/eselect/postgesql/active))"
# Remove service file outright.
[ -h /etc/eselect/postgresql/service ] && rm -f
/etc/eselect/postgresql/service
local slots=($(get_slots))
local index=${#slots[@]}
# In case all slots have been unmerged
if [ ${index} -eq 0 ] ; then
write_warning_msg "No slots found!"
write_warning_msg "Removing files (Control-C to abort) in..."
local i=6
while [ $[i--] -gt 0 ] ; do
echo -n " $i"
sleep 1
done
for sym_links in ${E_PATH}/active.links* ; do
unlinker ${sym_links}
done
rm -f ${E_PATH}/active
rm -f ${ENV_FILE}
do_action env update &> /dev/null
echo "Done!"
return 0
fi
# Reset, otherwise set the highest slot available.
if [[ ${slots[@]} =~ ${ACTIVE_SLOT} ]] ; then
do_reset
else
# best_version doesn't work here as pkg_postrm runs before the
world
# file is updated, thereby returning a false positive.
do_set ${slots[$index-1]}
fi
echo -en "\nCleaning out old links before refreshing..."
local sym_links
for sym_links in ${E_PATH}/active.links?* ; do
unlinker ${sym_links}
done
echo "done."
# Update paths to libs and docs
local ldpath
local x
for x in ${LIB_LIST} ; do
[ -h ${B_PATH}/${x}/postgresql ] &&
ldpath+="${B_PATH}/${x}/postgresql:"
done
ldpath="${ldpath%:}"
local manpath="${B_PATH}/share/postgresql/"
while [ $[--index] -gt -1 ] ; do
local curslot="${slots[$index]}"
echo -n "Refreshing symbolic links for ${curslot} applications
(like /usr/bin/psql${curslot//.})..."
for x in ${LIB_LIST} ; do
local
lib_path="${B_PATH}/${x}/postgresql-${curslot}/${x}/"
[ -d ${lib_path} ] && ldpath+=":${lib_path}"
done
local share_path="${B_PATH}/share/postgresql-${curslot}/"
[ -d ${share_path} ] && manpath+=":${share_path}"
linker "${B_PATH}/${LIBDIR}/postgresql-${curslot}/bin/*"
"${B_PATH}/bin" "${curslot//.}"
echo "done."
done
# Remove environment files that have been generated by the ebuilds
rm -f ${ENV_FILE}-*
store_config ${ENV_FILE} LDPATH "${ldpath}"
store_config ${ENV_FILE} MANPATH "${manpath}"
do_action env update &> /dev/null
}
